/* finger-sign-dojo · MediaPipe Hand Landmarker game
   All design values come from /tokens.css. No hex literals, no raw px font-size. */

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-text);
  min-height: 100dvh;
  word-break: keep-all;
  overflow-x: hidden;
}

body {
  font-size: var(--fs-body);
  line-height: var(--lh-body);
}

a { color: inherit; }

/* ---------- back link (always available, semi-transparent) ---------- */
.back-link {
  position: fixed;
  top: var(--space-sm);
  left: var(--space-sm);
  z-index: 60;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(5, 5, 7, 0.55);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  color: var(--ink-muted);
  text-decoration: none;
  font-size: var(--fs-caption);
  letter-spacing: var(--tr-eyebrow);
  opacity: 0.4;
  transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  backdrop-filter: blur(4px);
}
.back-link:hover { opacity: 0.95; color: var(--ink); border-color: var(--hairline-strong); }

/* ---------- stage (camera + canvas + HUD), shown only during play ---------- */
.stage {
  position: fixed;
  inset: 0;
  background: var(--canvas);
  display: none;
}
.stage.active { display: block; }

#cam {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
  filter: brightness(0.55) saturate(0.7);
  background: var(--surface-1);
}
#overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ---------- HUD overlay ---------- */
.hud {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  pointer-events: none;
  padding: var(--space-md);
  gap: var(--space-md);
}
.hud > * { pointer-events: auto; }

.hud-top {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  justify-content: flex-end;
}
.hud-pill {
  padding: 6px var(--space-sm);
  background: rgba(5, 5, 7, 0.65);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  color: var(--ink);
  font-size: var(--fs-caption);
  font-family: var(--font-mono);
  backdrop-filter: blur(6px);
  white-space: nowrap;
}
.hud-pill-accent { color: var(--primary); border-color: var(--primary); }
.hud-pill-btn {
  cursor: pointer;
  font-family: var(--font-text);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.hud-pill-btn:hover { background: var(--surface-2); color: var(--primary); border-color: var(--primary); }

/* target gesture display, center area */
.target {
  align-self: center;
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: rgba(5, 5, 7, 0.65);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-xxl);
  backdrop-filter: blur(8px);
  min-width: 240px;
}
.target-eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--tr-eyebrow);
  color: var(--ink-subtle);
  text-transform: uppercase;
}
.target-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xxs);
}
.target-emoji {
  font-size: 7rem;
  line-height: 1;
  filter: drop-shadow(0 4px 16px rgba(0, 217, 146, 0.35));
}
.target-name {
  font-size: var(--fs-headline);
  font-weight: 600;
  color: var(--ink);
}
.target-queue {
  display: flex;
  gap: var(--space-xxs);
  list-style: none;
  margin: 0;
  padding: 0;
}
.target-queue li {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: var(--ink-muted);
}
.target-queue li.done { background: var(--surface-2); border-color: var(--primary); color: var(--primary); }
.target-queue li.active { border-color: var(--primary); transform: scale(1.1); transition: transform 0.15s; }

.timer-bar {
  margin-top: var(--space-xs);
  width: 220px;
  height: 6px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.timer-fill {
  height: 100%;
  width: 100%;
  background: var(--primary);
  border-radius: var(--radius-pill);
  transition: width 0.1s linear, background 0.2s;
}
.timer-fill.warn { background: var(--brand-secure); }
.timer-fill.danger { background: var(--primary-focus); }

/* live read at bottom */
.liveread {
  align-self: end;
  justify-self: start;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: rgba(5, 5, 7, 0.65);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
}
.liveread-label {
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tr-eyebrow);
  color: var(--ink-subtle);
  text-transform: uppercase;
  font-weight: 600;
}
.liveread-emoji { font-size: 1.6rem; line-height: 1; }

.hud-toast {
  position: absolute;
  bottom: 22%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-xs) var(--space-md);
  background: rgba(5, 5, 7, 0.78);
  border: 1px solid var(--primary);
  border-radius: var(--radius-pill);
  color: var(--primary);
  font-size: var(--fs-body);
  font-weight: 600;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}
.hud-toast.show { opacity: 1; }

/* ---------- pause / clear overlays ---------- */
.overlay-screen {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 7, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
  padding: var(--space-lg);
}
.overlay-card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 420px;
  width: 100%;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.overlay-card h2 { font-size: var(--fs-display-md); font-weight: 600; line-height: var(--lh-display-md); letter-spacing: var(--tr-display-md); }
.clear-stars { font-size: var(--fs-display-lg); color: var(--primary); letter-spacing: 0.5rem; }
.clear-stat { color: var(--ink-muted); font-size: var(--fs-body); }
.clear-actions { display: flex; gap: var(--space-xs); flex-wrap: wrap; justify-content: center; }

/* ---------- buttons ---------- */
.btn-primary, .btn-ghost {
  font-family: var(--font-text);
  font-size: var(--fs-button);
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.btn-primary {
  background: var(--surface-1);
  color: var(--primary-hover);
  border: 1px solid var(--primary);
}
.btn-primary:hover { background: var(--surface-2); color: var(--primary); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--hairline);
}
.btn-ghost:hover { background: var(--surface-2); border-color: var(--hairline-strong); }

/* ---------- welcome card ---------- */
.welcome {
  min-height: 100dvh;
  padding: var(--space-xxl) var(--space-md) var(--space-xl);
  display: flex;
  align-items: flex-start;
  justify-content: center;
}
.welcome.hidden { display: none; }
.welcome-card {
  width: 100%;
  max-width: 720px;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
@media (min-width: 768px) {
  .welcome-card { padding: var(--space-xxl); }
}
.welcome-card .eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--tr-eyebrow);
  color: var(--primary);
  text-transform: uppercase;
}
.welcome-card h1 {
  font-size: var(--fs-display-md);
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--lh-display-md);
  letter-spacing: var(--tr-display-md);
  margin-top: calc(-1 * var(--space-sm));
}
@media (min-width: 768px) {
  .welcome-card h1 { font-size: var(--fs-display-lg); line-height: var(--lh-display-lg); letter-spacing: var(--tr-display-lg); }
}
.lede {
  color: var(--ink-muted);
  font-size: var(--fs-body-lg);
  line-height: var(--lh-subhead);
}
.section-title {
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--ink-subtle);
  font-weight: 600;
  margin-bottom: calc(-1 * var(--space-xs));
}

.gesture-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: var(--space-xs);
  list-style: none;
}
.gesture-grid li {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xxs);
  font-size: var(--fs-caption);
  color: var(--ink-muted);
}
.gesture-emoji { font-size: 2rem; line-height: 1; }

.howto {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  counter-reset: step;
}
.howto li {
  position: relative;
  padding-left: var(--space-xl);
  color: var(--ink-muted);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  counter-increment: step;
}
.howto li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-xs);
}
.level-pill {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-xxs);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-text);
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}
.level-pill:hover { border-color: var(--primary); background: var(--surface-2); }
.level-pill .lvl-no {
  font-size: var(--fs-caption);
  color: var(--ink-subtle);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
}
.level-pill .lvl-name { font-size: var(--fs-body-sm); font-weight: 500; }
.level-pill .lvl-stars { font-size: var(--fs-caption); color: var(--primary); letter-spacing: 0.15em; }
.level-pill .lvl-stars.dim { color: var(--ink-tertiary); }

.welcome-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.status {
  font-size: var(--fs-caption);
  color: var(--ink-muted);
  min-height: 1em;
  font-family: var(--font-mono);
}
.status.error { color: var(--primary-focus); }

.footnote {
  font-size: var(--fs-caption);
  color: var(--ink-tertiary);
  border-top: 1px solid var(--hairline);
  padding-top: var(--space-md);
}
.footnote a { color: var(--ink-muted); text-decoration: underline; text-decoration-color: var(--hairline-strong); }
.footnote a:hover { color: var(--primary); text-decoration-color: var(--primary); }

/* ---------- responsive tweaks ---------- */
@media (max-width: 480px) {
  .target { padding: var(--space-md); min-width: 180px; }
  .target-emoji { font-size: 5rem; }
  .timer-bar { width: 160px; }
  .hud { padding: var(--space-sm); }
  .hud-top { gap: 6px; }
  .hud-pill { padding: 4px var(--space-xs); }
}